Can you preheat the battery?

[Fish Fingers]

Really? Mine doesn't do this. Preheating preheats the cabin and very slightly increases battery temp, but nowhere near the ideal 30°c ideal temp? Are you sure about this?

Mine also preheats the cabin and only slightly the battery.

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[DrT]

For me it does warm the battery consistently when using timer function, this is one morning right after leaving to work, charging with 11kW AC to 100%.

This is a CT4 with optional heat pump. Randomly charging it does not have the same effect I think, you have to use the timer.

 

[Fish Fingers]

Interesting........
UK cars also have the heat pump.

So I am now wondering if the difference is that you are charging to 100% (I normally go to 80%) or 11kw charger (I have 7.4kw)?

 

[bwt]

Thanks for the comments and advice from svp6. I am travelling tomorrow morning so will set up the charge timer with my departure time and see what the starting temp of the battery is.

McgR - I will post separately regarding my trip from Newcastle in the UK to Val Thorens in the French alps.

 

[W1NGE]

Sure, but that wasn’t the question. The OP stated that he was getting no recouperation at 2 degree C. My question was whether there is a minimum temperature for recuperation to work

Check the level of recuperation on the Power Meter. Cold batteries charge slower at low temperatures. Not sure what the threshold is but I believe it will always provide some degree of regen.

I've never seen much energy being put back into the battery plus it must introduce friction which will slow the car down and / or require more energy to keep a constant speed. Also find it odd that no regen is available in Range mode - I assume for this reason and that coasting is preferred over any regen mode.

 

[W1NGE]

Really? Mine doesn't do this. Preheating preheats the cabin and very slightly increases battery temp, but nowhere near the ideal 30°c ideal temp? Are you sure about this?

Correct - mine neither.

I'm only charging at 7.4kW compared to 11kW so this will explain some of the difference but there's still a huge difference.

 

[W1NGE]

For me it does warm the battery consistently when using timer function, this is one morning right after leaving to work, charging with 11kW AC to 100%.

This is a CT4 with optional heat pump. Randomly charging it does not have the same effect I think, you have to use the timer.

Charging will naturally introduce heat. Forcing a charge level of 100% and setting a cabin temp with a departure timer will help to warm things up.

Most cars have the heat pump but it is optional in certain (hot) countries.

I've never seen this level of battery temp when home charging to 85% or 100% from a 7.4kW single phase source and a cabin temp of 23C (ambient 4C - 11C, garaged). Battery temp mid teens at best.

 

[Yves_0016]

Heatpump is a 990Eur (+1K USD) option here. I didn't get it. But reading the specs on the configurator it doesn't explain how preheating the car would preheat the battery to 30°c with the pump. Not convinced here that this is indeed the differentiator.

 

[McgR]

Heatpump is a 990Eur (+1K USD) option here. I didn't get it. But reading the specs on the configurator it doesn't explain how preheating the car would preheat the battery to 30°c with the pump. Not convinced here that this is indeed the differentiator.

How I understood it the heat pump uses excessive heat of the battery to heat the cabin (will have another look). I don’t think it actually heats the battery. The biggest difference is in temperatures below 5-10 degrees. If it’s worth the extra 920 euro I don’t know. I think the range difference will only be seen in longer cold road trips which basically in my case will be 1 longer holiday trip and 10 family visits during winter season.

 

[W1NGE]

Heatpump is a 990Eur (+1K USD) option here. I didn't get it. But reading the specs on the configurator it doesn't explain how preheating the car would preheat the battery to 30°c with the pump. Not convinced here that this is indeed the differentiator.

Heat pump is for efficient heating of the cabin and not the battery is my basic understanding but no doubt in certain scenarios plays a role elsewhere.

Most odd that it is an option in Belgium - kinda think you'd need it!

 

[Yves_0016]

Ageed with the above. So mistery still not solved...

Unless DrT's garage is a 30°c sauna ? ? it's still unclear how het gets this preheating in the battery. Very intriguing I must say.

 

[W1NGE]

Ageed with the above. So mistery still not solved...

Unless DrT's garage is a 30°c sauna ? ? it's still unclear how het gets this preheating in the battery. Very intriguing I must say.

The charging process is the reason and that he is pushing to 100% coupled with the departure timer which is drawing energy from the connected EVSE.

Perhaps it's a well heated garage to begin with and so the ambient if the battery is already high.

 

[McgR]

The charging process is the reason and that he is pushing to 100% coupled with the departure timer which is drawing energy from the connected EVSE.

Perhaps it's a well heated garage to begin with and so the ambient if the battery is already high.

So in his situation we should see the heated battery as a side effect rather than intentional.

 

[W1NGE]

So in his situation we should see the heated battery as a side effect rather than intentional.

That's my take on it

If I had made the charging point a location or stopover in Nav and it was recognised as such and it was a few miles away then the car would manage the battery preheat itself and for this by software and possibly calling on the heat pump where fitted.

I need to read up on this more to get a better understanding.

 

[Fish Fingers]

So in his situation we should see the heated battery as a side effect rather than intentional.

Its always good to know whether things are 'fault or feature' on the car ?........ Sometimes you have no idea.

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